A UNIVERSITY is teaching migrant students how to use a toilet correctly after complaints from cleaners that they were leaving them in an unhygienic state.

The toilet lessons, given on a poster on the backs of cubicle doors at Macquarie University, come after opposition citizenship spokeswoman Teresa Gambaro said migrants should be taught to use deodorant and wait in line, The Daily Telegraph reported.

Posters put up by the university show a person standing on the toilet seat and squatting over the bowl with a line through it. Another crossed-out image shows a person squatting on the floor.

Students are taught how to use sanitary bins, how to flush the toilet and wash their hands in other parts of the diagram under the heading: Protecting each other, use of female toilets.

A person sitting on the toilet seat is marked with a tick.

The signs were installed 15 months ago after complaints from a company contracted to clean campus toilets.